Abstract
References
1.
Khosla
T
. (1971 ) British Journal of Preventive and Social Medicine
25 , 203
2.
Khosla
T
Lowe
CR
. (1967 ) British Journal of Pre ventive and Social Medicine
21 , 122
3.
Khosla
T
Lowe
CR
. (1974 ) British Journal of Preventive and Social Medicine
28 , 156
4.
Lowe
C R
Pelmear
P L
Campbell
H
Hitchens
R A N
Khosla
T
King
T L
. (1968 ) British Journal of Preventive and Social Medicine
22 , 1